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Hawaii County, Hawaii facts for kids

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Hawaii County, Hawaii
Seal of Hawaii County, Hawaii
Map of Hawaii highlighting Hawaii County
Location in the state of Hawaii

Hawaii's location in the U.S.
Founded 1905
Seat Hilo
Largest City Hilo
 - Total
 - Land
 - Water

5,086.70 sq mi (13,174 km²)
4,028.02 sq mi (10,433 km²)
1,058.69 sq mi (2,742 km²), ?%
 - (2015)
 - Density

46/sq mi (17.7/km²)
Time zone Hawaii-Aleutian time zone: UTC-10

Hawaiʻi County is a county located in the U.S. state of Hawaii in the Hawaiian Islands. It is coterminous with the Island of Hawaiʻi, often called the "Big Island" to distinguish it from the state as a whole. As of the 2010 Census the population was 185,079. The county seat is Hilo. There are no incorporated cities in Hawaiʻi County (see Hawaii Counties). The Hilo Micropolitan Statistical Area includes all of Hawaiʻi County. Hawaiʻi County has a mayor-council form of government. Hawaii County is the largest county in the state, in terms of geography.

The current Mayor of Hawaii County is Harry Kim, who took office in 2016. Legislative authority is vested in a nine-member Hawaii County Council.

Hawaii County is one of seven counties in the United States to share the same name as the state they are located in (the other six counties are Arkansas County, Idaho County, Iowa County, New York County, Oklahoma County, and Utah County).


Hawaiʻi County has a total area of 5,086.70 square miles (13,174.5 km2); 4,028.02 square miles (10,432.5 km2) is land and 1,058.69 square miles (2,742.0 km2) is water (mostly all off the ocean shoreline but counted in the total area by the U.S. Census Bureau). The county's land area comprises 62.7 percent of the state's land area. It is the highest percentage by any county in the United States. (Delaware's Sussex County comes in second at 48.0 percent, while Rhode Island's Providence County is third at 39.55 percent.)

Major Highways

  • Route 11
  • Route 19
  • Route 130
  • Route 132
  • Route 137
  • Route 190
  • Route 200
  • Route 250
  • Route 270
  • Route 2000

Adjacent counties


Lehua blossoms hawaii 01
Lehua blossoms (ʻōhiʻa lehua), Hawaiʻi
Green turtles at an old lava flow and Hawaiian temple at background
Green turtle on an old lava flow and Hawaiian temple at background in Kona

As of 2010, the island had a resident population of 185,079 There were 64,382 households residing in the county. The population density was 17.7/km² (45.9/mi²). There were 82,324 housing units at an average density of 8/km² (20/mi²). The racial makeup of the county was 34.5% White, 0.7% African American, 22.6% Asian, 12.4% Native Hawaiian or other Pacific Islander, and 29.2% from two or more races; 11.8% of the population were Hispanics or Latinos of any race.


Historical population
Census Pop.
1900 46,843
1910 55,382 18.2%
1920 64,895 17.2%
1930 73,325 13.0%
1940 73,276 −0.1%
1950 68,350 −6.7%
1960 61,332 −10.3%
1970 63,468 3.5%
1980 92,053 45.0%
1990 120,317 30.7%
2000 148,677 23.6%
2010 185,079 24.5%
Est. 2015 196,428 6.1%
U.S. Decennial Census
Historical Population 1900-90

Census-designated places

Other communities

National protected areas

Sister cities

Hawaii County has 10 sisters:

Coordinates: 19°35′N 155°30′W / 19.583°N 155.5°W / 19.583; -155.5

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